# Datum
Used to generate baseline annotations. The generation steps are as follows:
Click the benchmark command
to bring up the Benchmark dialog box.
Set information such as the benchmark label and style in the dialog box
Benchmark label: Enter the text to set the benchmark label
Style: Select the style of the benchmark
Font: Set the font of the annotation
Text: Add custom text around the benchmark symbol
Color: Set the color of the annotation
Click once in the viewport to determine where the benchmark is pointing. Move the mouse to appear the benchmark preview.
Click again to place the benchmark in the current position of the mouse.
Note: When the benchmark points to the side line, the lead will automatically change to a polyline style.